[INFO] fetching crate opentracing-rs-jaeger 0.1.0...
[INFO] testing opentracing-rs-jaeger-0.1.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate opentracing-rs-jaeger 0.1.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate opentracing-rs-jaeger 0.1.0
[INFO] finished tweaking crates.io crate opentracing-rs-jaeger 0.1.0
[INFO] tweaked toml for crates.io crate opentracing-rs-jaeger 0.1.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate opentracing-rs-jaeger 0.1.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 70 packages to latest compatible versions
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.31)
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.9.2)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7ca7c8b651e6dec8f90266ae66588b19bea073dede13ef7943a6703c5d7b92b
[INFO] running `Command { std: "docker" "start" "-a" "d7ca7c8b651e6dec8f90266ae66588b19bea073dede13ef7943a6703c5d7b92b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7ca7c8b651e6dec8f90266ae66588b19bea073dede13ef7943a6703c5d7b92b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7ca7c8b651e6dec8f90266ae66588b19bea073dede13ef7943a6703c5d7b92b", kill_on_drop: false }`
[INFO] [stdout] d7ca7c8b651e6dec8f90266ae66588b19bea073dede13ef7943a6703c5d7b92b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8bfad47b550343f88c088cef46e6a814373144345aca69fecd0b19ece3f738e7
[INFO] running `Command { std: "docker" "start" "-a" "8bfad47b550343f88c088cef46e6a814373144345aca69fecd0b19ece3f738e7", kill_on_drop: false }`
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling opentracing-rs-core v0.1.0
[INFO] [stderr]    Compiling opentracing-rs-jaeger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/tracer.rs:39:32
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout]    |                                ^                                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 39 -     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout] 39 +     pub fn serve(&mut self) -> impl Future<Item = (), Error = ()> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:47:24
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<Reporter>>,
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<dyn Reporter>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:57:50
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |                                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<dyn Reporter>) {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]   --> src/reporter.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn report(&mut self, span: &Span) {}
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CompositeReporter` is never constructed
[INFO] [stdout]   --> src/reporter.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct CompositeReporter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_reporter` are never used
[INFO] [stdout]   --> src/reporter.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl CompositeReporter {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 51 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SAMPLER_PARAM_TAG_KEY` is never used
[INFO] [stdout]  --> src/sampler.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const SAMPLER_PARAM_TAG_KEY: &str = "";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sampling_rate` is never read
[INFO] [stdout]   --> src/sampler.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ProbabilisticSampler {
[INFO] [stdout]    |            -------------------- field in this struct
[INFO] [stdout] 35 |     sampling_rate: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `high` is never read
[INFO] [stdout]   --> src/span.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct TraceId {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 12 |     pub(crate) low: u64,
[INFO] [stdout] 13 |     pub(crate) high: u64,
[INFO] [stdout]    |                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TraceId` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span_id` is never read
[INFO] [stdout]   --> src/span.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct SpanState {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 27 |     trace_id: TraceId,
[INFO] [stdout] 28 |     span_id: u64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpanState` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `service_name` and `sampler` are never read
[INFO] [stdout]   --> src/tracer.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Tracer<S, R>
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     service_name: Cow<'static, str>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 13 |     sampler: S,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.28s
[INFO] running `Command { std: "docker" "inspect" "8bfad47b550343f88c088cef46e6a814373144345aca69fecd0b19ece3f738e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bfad47b550343f88c088cef46e6a814373144345aca69fecd0b19ece3f738e7", kill_on_drop: false }`
[INFO] [stdout] 8bfad47b550343f88c088cef46e6a814373144345aca69fecd0b19ece3f738e7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf7867b825819d7833f6d016d7747b255034fa8268e803744276daf12beb4b69
[INFO] running `Command { std: "docker" "start" "-a" "cf7867b825819d7833f6d016d7747b255034fa8268e803744276daf12beb4b69", kill_on_drop: false }`
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/tracer.rs:39:32
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout]    |                                ^                                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 39 -     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout] 39 +     pub fn serve(&mut self) -> impl Future<Item = (), Error = ()> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:47:24
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<Reporter>>,
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<dyn Reporter>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling opentracing-rs-jaeger v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:57:50
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |                                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<dyn Reporter>) {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]   --> src/reporter.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn report(&mut self, span: &Span) {}
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CompositeReporter` is never constructed
[INFO] [stdout]   --> src/reporter.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct CompositeReporter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_reporter` are never used
[INFO] [stdout]   --> src/reporter.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl CompositeReporter {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 51 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SAMPLER_PARAM_TAG_KEY` is never used
[INFO] [stdout]  --> src/sampler.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const SAMPLER_PARAM_TAG_KEY: &str = "";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sampling_rate` is never read
[INFO] [stdout]   --> src/sampler.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ProbabilisticSampler {
[INFO] [stdout]    |            -------------------- field in this struct
[INFO] [stdout] 35 |     sampling_rate: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `high` is never read
[INFO] [stdout]   --> src/span.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct TraceId {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 12 |     pub(crate) low: u64,
[INFO] [stdout] 13 |     pub(crate) high: u64,
[INFO] [stdout]    |                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TraceId` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span_id` is never read
[INFO] [stdout]   --> src/span.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct SpanState {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 27 |     trace_id: TraceId,
[INFO] [stdout] 28 |     span_id: u64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpanState` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `service_name` and `sampler` are never read
[INFO] [stdout]   --> src/tracer.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Tracer<S, R>
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     service_name: Cow<'static, str>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 13 |     sampler: S,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around type
[INFO] [stdout]   --> src/tracer.rs:39:32
[INFO] [stdout]    |
[INFO] [stdout] 39 |     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout]    |                                ^                                  ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 39 -     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stdout] 39 +     pub fn serve(&mut self) -> impl Future<Item = (), Error = ()> {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:47:24
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<Reporter>>,
[INFO] [stdout]    |                        ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 47 |     reporters: Vec<Box<dyn Reporter>>,
[INFO] [stdout]    |                        +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/reporter.rs:57:50
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |                                                  ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stdout]    |
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<dyn Reporter>) {
[INFO] [stdout]    |                                                  +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `span`
[INFO] [stdout]   --> src/reporter.rs:40:26
[INFO] [stdout]    |
[INFO] [stdout] 40 |     fn report(&mut self, span: &Span) {}
[INFO] [stdout]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CompositeReporter` is never constructed
[INFO] [stdout]   --> src/reporter.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 | pub struct CompositeReporter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `add_reporter` are never used
[INFO] [stdout]   --> src/reporter.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl CompositeReporter {
[INFO] [stdout]    | ---------------------- associated items in this implementation
[INFO] [stdout] 51 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `SAMPLER_PARAM_TAG_KEY` is never used
[INFO] [stdout]  --> src/sampler.rs:6:7
[INFO] [stdout]   |
[INFO] [stdout] 6 | const SAMPLER_PARAM_TAG_KEY: &str = "";
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `sampling_rate` is never read
[INFO] [stdout]   --> src/sampler.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct ProbabilisticSampler {
[INFO] [stdout]    |            -------------------- field in this struct
[INFO] [stdout] 35 |     sampling_rate: f64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `high` is never read
[INFO] [stdout]   --> src/span.rs:13:16
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct TraceId {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 12 |     pub(crate) low: u64,
[INFO] [stdout] 13 |     pub(crate) high: u64,
[INFO] [stdout]    |                ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TraceId` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `span_id` is never read
[INFO] [stdout]   --> src/span.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct SpanState {
[INFO] [stdout]    |            --------- field in this struct
[INFO] [stdout] 27 |     trace_id: TraceId,
[INFO] [stdout] 28 |     span_id: u64,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `SpanState` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `service_name` and `sampler` are never read
[INFO] [stdout]   --> src/tracer.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub struct Tracer<S, R>
[INFO] [stdout]    |            ------ fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 12 |     service_name: Cow<'static, str>,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 13 |     sampler: S,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.55s
[INFO] running `Command { std: "docker" "inspect" "cf7867b825819d7833f6d016d7747b255034fa8268e803744276daf12beb4b69", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf7867b825819d7833f6d016d7747b255034fa8268e803744276daf12beb4b69", kill_on_drop: false }`
[INFO] [stdout] cf7867b825819d7833f6d016d7747b255034fa8268e803744276daf12beb4b69
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 7b9b0e88e636e77bd26720eb5b64f2d0e6c7d661ff178ef5d3f6601c392691e6
[INFO] running `Command { std: "docker" "start" "-a" "7b9b0e88e636e77bd26720eb5b64f2d0e6c7d661ff178ef5d3f6601c392691e6", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/tracer.rs:39:32
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stderr]    |                                ^                                  ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 39 -     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stderr] 39 +     pub fn serve(&mut self) -> impl Future<Item = (), Error = ()> {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reporter.rs:47:24
[INFO] [stderr]    |
[INFO] [stderr] 47 |     reporters: Vec<Box<Reporter>>,
[INFO] [stderr]    |                        ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 47 |     reporters: Vec<Box<dyn Reporter>>,
[INFO] [stderr]    |                        +++
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/reporter.rs:57:50
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stderr]    |                                                  ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stderr]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stderr] help: if this is a dyn-compatible trait, use `dyn`
[INFO] [stderr]    |
[INFO] [stderr] 57 |     pub fn add_reporter(&mut self, reporter: Box<dyn Reporter>) {
[INFO] [stderr]    |                                                  +++
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `span`
[INFO] [stderr]   --> src/reporter.rs:40:26
[INFO] [stderr]    |
[INFO] [stderr] 40 |     fn report(&mut self, span: &Span) {}
[INFO] [stderr]    |                          ^^^^ help: if this is intentional, prefix it with an underscore: `_span`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `CompositeReporter` is never constructed
[INFO] [stderr]   --> src/reporter.rs:46:12
[INFO] [stderr]    |
[INFO] [stderr] 46 | pub struct CompositeReporter {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated items `new` and `add_reporter` are never used
[INFO] [stderr]   --> src/reporter.rs:51:12
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl CompositeReporter {
[INFO] [stderr]    | ---------------------- associated items in this implementation
[INFO] [stderr] 51 |     pub fn new() -> Self {
[INFO] [stderr]    |            ^^^
[INFO] [stderr] ...
[INFO] [stderr] 57 |     pub fn add_reporter(&mut self, reporter: Box<Reporter>) {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant `SAMPLER_PARAM_TAG_KEY` is never used
[INFO] [stderr]  --> src/sampler.rs:6:7
[INFO] [stderr]   |
[INFO] [stderr] 6 | const SAMPLER_PARAM_TAG_KEY: &str = "";
[INFO] [stderr]   |       ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `sampling_rate` is never read
[INFO] [stderr]   --> src/sampler.rs:35:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | pub struct ProbabilisticSampler {
[INFO] [stderr]    |            -------------------- field in this struct
[INFO] [stderr] 35 |     sampling_rate: f64,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `high` is never read
[INFO] [stderr]   --> src/span.rs:13:16
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub struct TraceId {
[INFO] [stderr]    |            ------- field in this struct
[INFO] [stderr] 12 |     pub(crate) low: u64,
[INFO] [stderr] 13 |     pub(crate) high: u64,
[INFO] [stderr]    |                ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `TraceId` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `span_id` is never read
[INFO] [stderr]   --> src/span.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | pub struct SpanState {
[INFO] [stderr]    |            --------- field in this struct
[INFO] [stderr] 27 |     trace_id: TraceId,
[INFO] [stderr] 28 |     span_id: u64,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `SpanState` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `service_name` and `sampler` are never read
[INFO] [stderr]   --> src/tracer.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr]  7 | pub struct Tracer<S, R>
[INFO] [stderr]    |            ------ fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 12 |     service_name: Cow<'static, str>,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 13 |     sampler: S,
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `opentracing-rs-jaeger` (lib) generated 11 warnings (run `cargo fix --lib -p opentracing-rs-jaeger` to apply 3 suggestions)
[INFO] [stderr] warning: `opentracing-rs-jaeger` (lib test) generated 11 warnings (11 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/opentracing_rs_jaeger-3cbb576ed22c6108)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests opentracing_rs_jaeger
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/tracer.rs:39:32
[INFO] [stderr]    |
[INFO] [stderr] 39 |     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stderr]    |                                ^                                  ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr] 39 -     pub fn serve(&mut self) -> (impl Future<Item = (), Error = ()>) {
[INFO] [stderr] 39 +     pub fn serve(&mut self) -> impl Future<Item = (), Error = ()> {
[INFO] [stderr]    |
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "7b9b0e88e636e77bd26720eb5b64f2d0e6c7d661ff178ef5d3f6601c392691e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b9b0e88e636e77bd26720eb5b64f2d0e6c7d661ff178ef5d3f6601c392691e6", kill_on_drop: false }`
[INFO] [stdout] 7b9b0e88e636e77bd26720eb5b64f2d0e6c7d661ff178ef5d3f6601c392691e6